Web-feeding mechanism for printing-presses.



W. A. PRINGLE. WEB FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED AUG. 4. 1908.

Patented Apr. 18, 1911.

2 SHEETS-SHEET 1.

INVENTOR W 414% BY {a WW ATTORNEYS.

WIT 8E8:

W. A. PRINGLE. WEB FEEDING MECHANISM FOR PRINTING PRESSES. APPLIOATIdNFILED AUG. 4, 1908. I 939,371 1 Patented Apr. 18, 1911.

' 2 SHEETS-SHEET 2.

\ 'M 'ZVW 75w ORNEYS.

' WILLIAM A. PRINGLE, or

UNITED STATES PATENT OFFICE.

NIAGARA FALLS NEW YORK, ASSIGNOR TO THE CARTER- CRUME COMPANY, LIMITED,F NIAGARA FALLS, NEW YORK, A CORPORATION OF CANADA.

WEB-FEEDING MECHANISM FOR PRINTING-PRESSES 989.871. Sbecifieation ofLetters Patent Patented Apr. 18, 1911. Application filed August 4. 1908.Serial No. 446,838. To all whom it may concern. from the supply roll atrifle faster than the Be it known that a citizen of the United States.residing at i Niagara Falls. in the county of Niagara and State of XewYork, have invented certain new and useful Improvements in IVeb-Feeding)Iechanism for Printing-Presses," of which the following is a full,clear, and exact description. such a will enable others i skilled in theart to which it appertains to make and use the same.

lns nvention relates to web-feeding mechanism. and more particularly tomech- I anism of this character adapted for use in printing presses. Oneof the objects of the invention is to I provide web-feeding mechanismsuch that the guiding of the webs through "the press may be facilitated.

he invention accordingly consists in thefeatures of construction.combinations of elements and arrangement of parts which, will beexemplified in the construct-ion hereinafter set forth, and the scope ofthe application of which will be indicated in the following claims.

n the accompanying drawings wherein I is illustrated one of the variouspossible embodiments of my inventio horizontal sectional view portion ofthe printing press, showing the mechanism constituting this embodimentofmy invention ig. 2 is a rear elevation of the mechanism shown in Fig. 1.Fig. 3 is a side elevation thereof. Fig. 4 is a a. portion of themechathe partsbeing shown in adifferent Figure 1 is a iflerent position.the view being also drawn imilar reference characters refer to similarparts throughout the several views of the rawings.

In order to render the objects vention clearer of understanding, it maer properly to guide his result susually attained that draw the web I.VILLIAZI A. PRINGLE, l

ladapted to be d I ported upon a link 'nected as In prior conennecessary to regulate f certain of the feed ing usually performed bythefeed operator and necessitatingconstant watchfulness. By my inventionthe web is 'fed into the press in such manner that a predeterminedamount of slack is always automatically maintained between the feedrolls.

eferrlng now to the drawings 1 denotes adapted to rest upon the base ofthe p Rotatably mounted in the frame is a feed roll 4.- which isprovided with a. sprocket 5 he press by are pivotally mounted frame. *1V 1 I A guide roll is supported in the up per portion of the frame. andthe web 11 after passing between over roll 10 to f tween roll 10 andfeed rolls which are shown diagrammatically at 13 and 14, saidlatter'rollers being adapted to feed the web into the press. lackportion 12 1s formed in therefore, peripheral and 6. and 13 and14comprises aweight which rests in the slack portion 12, said weight inthe present instance being comprlsed by aroller 15. This roller isrotatably sup- 16 which in turn is e01 flexible member or a lever 18pivotally Lever 18 interme-l by means of a cord 17 with the end ofsupported in the frame.

upon a rod This sleeve has at each end a short arm 2-3 is amount ofslack by stopping the opera- 1 rolls, this workrolls 4 and 6 passes- 61s a rider this embodiment of slack portion 1 point the weighted rolleris lifted, there- 2 the slack portion cally controlled independently ofthe This mechanism the operator amount of '40 regulate the widelydifferent mi ht be said to 65 ranged which is located immediatelybeneath one of thearms 7 which support the idler or rider roll 6.

Having thus described the construction of my invention, the operationthereof may now be understood. v When the slack portion 12 gets below acertain point the weight of the roller 15 is thrown on the lever 18,thereby, through sleeve 21 and arms 23, lifting the u er feed roll 6@from feed roll 4, thus releasing the pressure on the web and retardingthe ,feed thereof. When the loop of the rises above a predeterminedlever 18 to rise and the feed back upon roller 4: to increase the supplyof slack. In practice the parts are so adjusted that the loop formed by12 is always automatically maintained atthe same length.

In the drawings I have shown the mechanism as'arranged for feeding twowebs side liv side, the slack of .each being automatiother. can beutilized to feed a wide single web, a long weighted roller beingattached to each end of the levers 18. It will accordingly be seen thatI have proby allowing roll 6 to fall 30 vidcd mechanism well adapted toattain among others all the objects thereof in a simple yet eflicientmanner. By means 0 this construction a great amount of labor is saved,inasmuch as it is not necessary for to periodically stop and start toprovide the proper Another advantage attained by means of thisconstruction isthat since it isunnecessary to stop the press to slack inthe'web, amount of printing is effected in a single ress in the giventime.

As many changes could be made in the above construction and embodimentsof this inven- ,tion could be made without departing from thescopethereof, it isintended that all matter contained in the abovedescription or shown in. the accompanying drawings shall the press inorder slack.

be interpreted as illustrative and not in a limiting sense. It is' alsoto be understood that thelanguage used in the following claims isntended to cover all of the generic and specific features of theinvention herein described and all statements of the scope of theinvention which,

fall therebetween.

a'vingdescribed my invent1on,'what I claini as new and desire to secureby Letters Patent is: i H

-- 1. In an apparatus of the class described,

/. the combination of two pairs of feed rolls adapted to feed a web, onepair being arbehind the other and normally -means for varying a. greatermany apparently as a matter of language,

driven at a greater peripheral velocity, whereby slack is produced inthe web, and the pressure exerted upon said pairs of rolls, wherethe webby one of by a uniform amount of'slack is maintained between said pairsof rolls.

2. In an apparatus of the class described, the combination of two pairsof adapted to feed a web, one pair of said rolls being arranged behindthe other and adapted to be driven at a greater peripheral velocity,whereby. slack is produced betweensaid pairs of rolls, and means forautomatically varying the pressure exerted upon the 'web by the rearmost.pair of said rolls, whereby a uniform amount of slack is maintainedbetween said pairs of rolls.

3. In an apparatus of the class described, the combination of two pairsof feed rolls adapted to feed a web, one pair of rolls being disposedbehind the other and adapted to be driven at a greater peripheralvelocity, whereby slack is produced in tween said pairs of rolls, andmeans controlled by the slack port-ion of the web for varying thepressure exerted upon said web by one of said pairs of rolls, whereby auniform amount of slack is maintained.

4. In an apparatus of the class described, the combination withweb-feeding means comprising two pairs of rolls, one pair thereof beingdisposed behind the other and driven at a higher peripheral velocitywhereby slack is produced in the web between said pairs of rolls, andmeans controlled by theslack portion of the web for moving the rolls ofthe rearmost pair thereof sure upon the web may be varied and a uniformamount of slack maintained between said pairs of rolls. 1

i 5. In an apparatus of the class described, the combination with twopairs of rolls adapted to feed a web, one pair being arranged behind thegther and adapted to be driven at a higher peripheral velocity,

the web between said pairs of rolls, and means controlled by the slackportion of the Web for moving one pair relatively the pressure upon thcess of slack will be taken up pair of rolls.

6. In an apparatus of the class described, in combination, two sets offeed rolls adaptby the other of the rolls of the rearmost the webberelatively to each other, whereby the prese web, whereby any exedtofeed a web,one set being disposed bea greater pehind the other andrunning at is produced ripheral velocity, whereby slack in thewebsbetween said sets of rolls, the rolls of the rearmost toward andfrom thethe pressure on the movable roll from engagement with the feed rolls.same to swing said first mentioned constant whereby a unif when morethan apredetermined amount of slack exists between said sets to allowsome of the slack to be taken up by the foremost set of rolls.

' In apparatus of combination with the carried by the frame, ried froman said other thereof frame, of'a feed roll a second 'feed roll car bythe frame and said first mentioned feed roll, a second of feed rollsarranged in ad first named"feed rolls, said first named e run at aarranged in advance of pair and adapted to be driven at a lessperipheral velocity than the first mentioned pair, whereby slack ismaintained in the web, a pivotally mounted lever engaging said arms, anda weight resting in the slack portion of the web "pairs of rolls, saidweight being connected with said lever and adapted to cause the saidarms to carry the roll the other of said rolls'to vary web passingtherebetween, whereby a un1- form amount of slack is maintained betweensaid 'olls.

9. apparatus of the class described, the combination with web-feedingmeans comprising two pairs of continuously rotating other and beingdriven at a higher pe; 'ripheral velocity, whereby slack is produced inthe web between said pairs ofrolls, and means acting adaptedautomatically to vary operation the the feeding speed of said rol lsrema'inin orm amount of slack is at all times maintained between saidpairs of rolls.

10;- In apparatus'of the the combination withthe feeding ,meanscomprising a driven feed roll carried by the idler. feed roll restingupon said class described,

positively frame, first men- 'tioned feed roll, pivotally' mounted armsroll, a lever pivler feed the frame engaging whereby said idler feedroll in y be carried the class described, the

movable toward and Vance of I said swing the same, a

the pressure upon the 11s, one pair thereof belng disposed behinduponone pair of said rolls 1 frame, of web- 1 combination,

toward or from said first mentioned feed; roll, a pivotally mountedlever engaging said by slack is produced in the web between said pairsof rolls, a weighted roller the slack portion of said web, andconnecting said roller with tioned lever. a

11. In apparatus of the class described, the combination with the frame,of webfeeding means comprisin a positively driven feed roll carried bythe frame, an idler. feedroll tioned feed roll, ,pivota'lly carryingsaid idler feed otall resting in means for roll, a lever pivy mountedupon the frame engaging whereby said idler feed roll may be carriedtoward or from said first mentioned feed roll, a pivotally mounted leverengaging said first mentioned lever andadapted to engaging the web andsame and to be driven at a l velocity than that of flexible meansconnecting said second IIIBIlt-lOllQd lever.

two pairs of tating feed rolls spaced from the other and iigherperipheral velocity produced in the web between said pairs of rollls,said pairs of rolls being driven at'a re ative ly constant rate ofspeed, and means for automatically maintaining the length of lackportion pf the web substantially uniform. I 1'3. In apparatus of theclass described, in combination, two pairs tating feed "rolls one pairthereof bein spaced from the other and being driven at a higherperipheral velocit' whereby slack is produced in the web between saidrolls, said pairs of rolls being driven at a continuously robeing drivenat a whereby slack is relatively constant rate of speed, and means f theweb substantially In apparatus of the class described, in a pair ofcontinuously rotating feed rolls adapted to f resting upon said firstmen-v mounted arms 4 arms *and adapted to swing the same,

second pair of feed rolls onepa r thereof being" I said second menofcontinuously romeans operating at a contension upon the web forcontrolling the action of said feeding means whereby the web is fed at asubstantially uniform rate of speed, as desired.

In testimony whereof I aflix my signature, 15

two witnesses.

in the presence of i A. PRINGLE.

XVILLIAM \Vitnesses:

EDWARD KIRBY BATTLE, WVILLIAM 'ZINTER.

